15151515252640 has 48 divisors (see below), whose sum is σ = 38548951311528. Its totient is φ = 5594405630976.

The previous prime is 15151515252637. The next prime is 15151515252659. The reversal of 15151515252640 is 4625251515151.

It can be written as a sum of positive squares in 4 ways, for example, as 10959357282064 + 4192157970576 = 3310492^2 + 2047476^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3642189087 + ... + 3642193246.

Almost surely, 2^{15151515252640} is an apocalyptic number.

15151515252640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15151515252640 is an abundant number, since it is smaller than the sum of its proper divisors (23397436058888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15151515252640 is a wasteful number, since it uses less digits than its factorization.

15151515252640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7284382361 (or 7284382353 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 43.

Adding to 15151515252640 its reverse (4625251515151), we get a palindrome (19776766767791).

The spelling of 15151515252640 in words is "fifteen trillion, one hundred fifty-one billion, five hundred fifteen million, two hundred fifty-two thousand, six hundred forty".